CN102947033B - Ring-shaped hole cutter - Google Patents
Ring-shaped hole cutter Download PDFInfo
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- CN102947033B CN102947033B CN201080067493.0A CN201080067493A CN102947033B CN 102947033 B CN102947033 B CN 102947033B CN 201080067493 A CN201080067493 A CN 201080067493A CN 102947033 B CN102947033 B CN 102947033B
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- bite
- cutting edge
- radial direction
- drill body
- hole making
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- 230000002093 peripheral effect Effects 0.000 claims description 13
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/50—Drilling tools comprising cutting inserts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
Disclosed is a ring-shaped hole cutter capable of smoothly discharging chips. The ring-shaped hole cutter includes a plurality of cutting blades comprising a first cutting blade (38a) and a second cutting blade (38b) disposed alternately in the circumferential direction at the front end surface of the ring-shaped hole cutter. A cutting edge (42b) of the second cutting blade includes a portion that extends radially outward from the radially inner end of the radially inner portion of the cutting edge (42b), and the extending portion inclines further toward the front of the ring-shaped hole cutter the more the extending portion faces radially outside. A gash surface (52) of a gash (36) adjoining the front side of the second cutting blade in the rotational direction includes: a gash inner inclined surface (54b) which inclines further to the rear of the ring-shaped hole cutter the more the gash inner inclined surface (54b) faces radially outside from the radially inner edge of the gash surface (52); and a gash outer inclined surface (54c) which continues to the gash inner inclined surface and inclines further to the rear than the gash inner inclined surface the more the gash outer inclined surface (54c) faces radially outside from the gash inner inclined surface, and which continues to an inner wall surface of a flute where the gash is disposed. The gash outer inclined surface defines a passage (56) in the direction in which chips are sent out toward the flute after the chips are cut from the radially inner portion of the cutting edge of the second cutting blade.
Description
Technical field
The present invention relates to the circular openings device installing the bites such as multiple super-steel blades along the annular anterior face being formed as columnar hole making drill body.
Background technology
Circular openings utensil has: by the multiple blades integrated type of the hard materials such as high-speed steel by columnar hole making drill body and front end thereof; Or the type of to separate the bites such as the super-steel blade purchased with this hole making drill body has been installed in the annular anterior face of columnar hole making drill body.
In order to the machinability and durability that improve this circular openings device have carried out various research.Such as, United States Patent (USP) the 4th, 452, deliver the circular openings device of above-mentioned last type for No. 554, on this circular openings device, each bite is divided into three bite parts at radial direction, and arranges them with offseting one from another in direction of rotation, thus discharge chip swimmingly, to improve machinability and the durability of this circular openings device.No. 5-154709, Japanese Unexamined Patent Publication has delivered the circular openings device of above-mentioned the second type, on this circular openings device, purchase the first and second two kinds of bites, first and second bites that stagger carry out the radial direction part of cutting, and make the first bite have the cutting portion that in direction of rotation be in staggered configuration the same as above-mentioned United States Patent (USP), thus discharge chip swimmingly.
At first technical literature
Patent document
Patent document 1: United States Patent (USP) the 4th, 452, No. 554
Patent document 2: No. 5-154709, Japanese Unexamined Patent Publication
Summary of the invention
Invent problem to be solved
The object of the invention is to machinability and the durability of the circular openings device improving above-mentioned the second type.
For solving the means of problem
The invention provides a kind of circular openings device, the feature of this circular openings device is to have:
The rear end linked with rotating driving device, the front end of the side contrary with this rear end, has the front end face of annular and the columnar hole making drill body of the inner peripheral surface rearward extended from this front end face and outer peripheral face;
Multiple chip area, described multiple chip area is in the form of slot, this outer peripheral face of this hole making drill body is spaced apart and arranged at circumferentially spaced, extend in the shape of a spiral from this front end face of this hole making drill body towards rear respectively, respectively with the direction of rotation of this circular openings device for benchmark, delimited by front wall, rear wall and the interior sidewall surface that extends between this inside edge, front and inside edge, rear;
Spiral helicine land portion, described land portion is formed between adjacent this chip area of this circumference;
Otch, described otch, in through be arranged on this hole making drill body front end with delimiting this interior sidewall surface of each chip area of the radial direction of this hole making drill body, delimited by the cut sides to be formed from this front end face to each chip area sunken inside; With
Multiple bite, described multiple bite is embedded in this land in the front end of this hole making drill body, has rake and flank respectively; The chip area that described rake is adjacent towards the front side being benchmark and this land with this direction of rotation, this rear wall along this adjacent chip area extends, and has the cutting edge that this front end face comparing this hole making drill body is positioned at the anterior position of hole making drill body; Described flank from this cutting edge genesis with this direction of rotation for benchmark rearward extends, towards the front of this hole making drill body;
The plurality of bite is made up of the first and second bites, the first bite be arranged alternately by the circumference of this front end face at this hole making drill body and the second bite are formed, this cutting edge of this second bite is made up of radial direction inboard portion and radial direction Outboard Sections, the radial direction inboard portion that the correspondence of this cutting edge of this first bite is compared in described radial direction inboard portion with this hole making drill body for benchmark is positioned at anterior position, the radial direction Outboard Sections that described radial direction Outboard Sections compares the correspondence of this cutting edge of this first bite with this hole making drill body for benchmark is positioned at rear position, the part extended outside radial direction from radial direction medial extremity of the cutting edge of this second bite tilts to the front of this hole making drill body gradually along with outside radial direction,
The cut sides of this otch adjoined with the front side of this direction of rotation of this first bite is formed as inclined plane, described inclined plane more outside radial direction more to the back sweep of this hole making drill body, and continuous with the interior sidewall surface of the chip area being provided with this otch,
The cut sides of this otch adjoined with the front side of this direction of rotation of this second bite is made up of lateral incline in otch and the outer lateral incline of otch; In described otch lateral incline along with the radial direction inside edge from this cut sides outside radial direction to the back sweep of this hole making drill body; The outer lateral incline of described otch is continuous with lateral incline in this otch, and more outside radial direction, the rear of getting over to this hole making drill body tilts more significantly than lateral incline in this otch, and continuous with the interior sidewall surface of the chip area being provided with this otch; The outer lateral incline of this otch delimited out along being cut by this radial direction inboard portion of this cutting edge from this second bite and the passage of the transport direction of the chip sent towards this chip area.
In this circular openings device, bite defines the structure of interconnected first bite and the second bite, make the first bite radius of clean-up direction Outboard Sections, make the second inboard portion, bite radius of clean-up direction, to alleviate the load to each cutter, simultaneously, sent by the inside from the first bite in chip and the front face side of the second bite that chip blocking easily occurs to discharge arranges otch, in the otch little by angle of inclination as above, the outer lateral incline of the large otch of lateral incline and angle of inclination constitutes the cut sides of delimiting described otch, thus the more lateral of lateral incline becomes the part formation passage in chip path in otch, to reduce the resistance to chip.The reason arranging lateral incline in the little otch in angle of inclination is, make relative hole making drill body form inclined plane and the Thickness Ratio of this hole making drill body that stays forms the large single inclined plane in angle of inclination time thicker, to keep the intensity of this residual wall thickness part.The part extended outside radial direction from radial direction medial extremity of the cutting edge of the second bite is tilted to the front of this circular openings device gradually along with outside radial direction, is to make the chip of cutting as far as possible outside radial direction.
Specifically, in the otch preferably making the inclined plane of the cut sides adjoined with above-mentioned first bite and adjoin with above-mentioned second bite, lateral incline has identical angle of inclination.This conveniently processes.
In addition, the radial direction inboard portion of the cutting edge of the second bite can be made to be formed as chevron, and this chevron is made up of the summit outside sloping portion inside sloping portion outside sloping portion, cutting edge inside cutting edge and this cutting edge and cutting edge between sloping portion; Inside this cutting edge, sloping portion tilts to the front of this hole making drill body gradually along with the radial direction medial extremity of the cutting edge from the second bite outside radial direction; Outside this cutting edge, inside sloping portion and cutting edge, sloping portion is continuous, more outside radial direction more to the back sweep of this hole making drill body.Cut respectively in radial direction inner side and outer side centered by summit, reduce the width of cut chip, make it easily discharge.
In this case, this radial direction Outboard Sections of the cutting edge of the first bite can be made to be formed as chevron, and this chevron is made up of the summit outside sloping portion inside sloping portion inside sloping portion, cutting edge outside bite and cutting edge and cutting edge between sloping portion; Outside this bite, sloping portion tilts to the front of hole making drill body gradually along with the radial direction outboard end of the cutting edge from the first bite inside radial direction; Inside this cutting edge, outside sloping portion and this bite, sloping portion is continuous, more outside radial direction more to the back sweep of this hole making drill body.
More specifically, the radial direction Outboard Sections of the cutting edge of the second bite and the second bite can be made to tilt continuously, the angle of inclination tilted outside radial direction along with the summit of the cutting edge from the second bite be less than this first bite bite outside the angle of inclination of sloping portion, the outboard end of the cutting edge of the second bite becomes the position close with the outboard end of the bite of this first bite.
Part inside the relative velocity ratio of the part opposite piece that what bite was natural is outside its radial direction is faster, and therefore, Outboard Sections bears larger load than inboard portion.Therefore, with regard to circular openings device of the present invention, the outer ledge of the first outer lateral incline of the first bite will bear maximum load, correspondingly also easily produce defect.In the present invention, the position of the outboard end of the bite close to this first bite is become by the outboard end of the cutting edge making the second bite, even if thus the outboard end generation defect at the edge, cutting end of the first bite, the outboard end of the cutting edge of the second bite also can replace the outboard end at the edge, cutting end of the first bite to cut, to keep the service life of this circular openings device.
On above-mentioned circular openings device, preferably make the cut sides of otch while the front to this direction of rotation from the substantial middle position of the fore-and-aft direction of this hole making drill body on the rake of adjacent bite extends, the front towards hole making drill body extends to the front end face of annular.
By forming cut sides like this, the middle position of the blade that leans forward of bite becomes to the part at rear the state being embedded in and being supported in hole making drill body, will keep bite more firmly.
Below, based on embodiment shown in the drawings, the present invention will be described.
Accompanying drawing explanation
Fig. 1 is the side view of circular openings device of the present invention.
Fig. 2 is the partial cross section figure of the hole making drill body seeing Fig. 1 along II-II line.
Fig. 3 A is first bite of Fig. 1 and the enlarged side view of peripheral part thereof.
Fig. 3 B is the sectional view seen along III B-III B of Fig. 3 A.
Fig. 4 A is second bite of Fig. 1 and the enlarged side view of peripheral part thereof.
Fig. 4 B is the sectional view seen along IV B-IV B of Fig. 4 A.
Fig. 5 is the figure of the shape for comparing the first and second bites.
Detailed description of the invention
Circular openings device 10 of the present invention shown in Fig. 1 possesses: columnar hole making drill body 18, and described hole making drill body 18 has the front end face 12 of annular and the inner peripheral surface 14 rearward extended from this front end face and outer peripheral face 16; Connecting rod 20, described connecting rod 20 rearward extends from the rear end of this hole making drill body 18, links with the rotating output shaft of not shown Vidacare corp.
At the outer peripheral face 16 of hole making drill body 18, multiple chip areas 22 of the channel-shaped extended in the shape of a spiral towards rear from the front end face 12 of hole making drill body 18 are set.Each chip area 22 delimited by with lower part, that is: with the direction of rotation A of this circular openings device 10 be benchmark, respectively at front side and rear side along the inside edge, front 24 that this chip area 22 extends in the shape of a spiral and inside edge, rear 26(Fig. 2); From this inside edge, front 24 to the front wall 28 that the outer peripheral face 16 of hole making drill body extends outside roughly radial direction; From inside edge, rear 26 to the rear wall 30 that the outer peripheral face 16 of hole making drill body 18 extends outside roughly radial direction; And the interior sidewall surface 32 extended between inside edge, front 24 and inside edge, rear 26.Spiral helicine land portion 34 is formed between adjacent chip area.
Arrange otch 36 in the front end of hole making drill body 18, make the interior sidewall surface 32 of each chip area of delimitation through at the radial direction of this hole making drill body 18, the bites such as carbide chip 38 are disposed adjacent in each land with otch 36.
Bite 38 entirety is formed as block, has rake 40 and flank 44; The chip area 22 that rake 40 is adjacent towards the front side being benchmark and this land 34 with the direction of rotation of this circular openings device 10 and otch 36, from be positioned at hole making drill body 18 axis direction anterior position cutting edge 42 extend along the rear wall 30 of this adjacent chip area 22; Flank 44 extends from this cutting edge 42 to the direction of rotation rear of circular openings device 10.The cut sides 52 extending to delimit otch 36 from the front end face 12 of hole making drill body 18 in chip area 22 becomes terminal in the substantial middle position of the above-mentioned axis direction of rake 40, rake 40 be more exposed to otch 36 by the part in axis direction front than this middle position.
Specifically, bite 38 has the first bite 38a and the second bite 38b that are arranged alternately in the circumference of the front end face 12 of hole making drill body 18.First bite 38a as shown in figs.3 a and 3b, its cutting edge 42a sees in the direction of rotation of circular openings device 10 and is formed as chevron, and flank 44a has: the first crest line 48a extended towards the rear in above-mentioned direction of rotation from the chevron summit 42a ' of cutting edge 42a; From this first crest line 48a more outside the radial direction of circular openings device 10 more to the first outer lateral incline 50a of the back sweep of this circular openings device 10; And from this first crest line 48a more towards radial direction inside more to this circular openings device 10 axis direction back sweep first in lateral incline 51a.
Second bite 38b as illustrated in figures 4 a and 4b, its cutting edge 42b sees at above-mentioned direction of rotation A and is formed as chevron, has: from be positioned at than cutting edge 42a chevron summit 42a ' more by the position inside the radial direction of circular openings device 10, the second crest line 48b that the chevron summit 42b ' of cutting edge 42b extends towards the rear in above-mentioned direction of rotation; From this second crest line 48b more outside the radial direction of circular openings device 10 more to the second outer lateral incline 50b of the back sweep of this circular openings device 10; And from this second crest line 48b more inside radial direction more to this circular openings device axis direction back sweep second in lateral incline 51b.
The cut sides 52a of the otch 36a adjoined with the front side of the above-mentioned direction of rotation A of the first bite 38a is provided with inclined plane 54a; The front of this inclined plane 54a simultaneously to above-mentioned direction of rotation from the substantial middle part adjoining position of the rake 40a with the first bite 38a extends the front end face 12 that an axis direction front that facing hole making drill body 18 extends to annular, at least the part close to rake 40a more outside above-mentioned radial direction more with the above-mentioned axis direction back sweep of the first angle of inclination a to hole making drill body 18, and continuous with the interior sidewall surface 32 of the chip area 22 being provided with otch 36a.
The cut sides 52b of the otch 36b adjoined with the front side of the above-mentioned direction of rotation of the second bite 38b is made up of lateral incline 54b in otch and the outer lateral incline 54c of otch; In this otch, lateral incline 54b one side from the substantial middle part adjoining position of the rake 40b with the second bite 38b extends an axis direction front that facing hole making drill body 18 and extends to annular front end face 12 to the front of above-mentioned direction of rotation, at least the part close to rake 40b more outside above-mentioned radial direction more with the above-mentioned axis direction back sweep of the angle a identical with above-mentioned first angle of inclination a to hole making drill body 10; The outer lateral incline 54c of this otch is connected with this interior lateral incline 54b, more outside above-mentioned radial direction more to be greater than the above-mentioned axis direction back sweep of the second angle of inclination b to hole making drill body 18 of the first angle of inclination a, and continuous with the interior sidewall surface 32 of the chip area 22 being provided with this otch 36b; The outer lateral incline 54c of this otch delimit out along being cut by the cutting edge 42b from the second bite 38b and the passage 56 of the transport direction B of the chip sent towards chip area 22.
In the present embodiment, as shown in Figure 5, the summit 42b ' making the summit 42a ' of the cutting edge 42a of the first bite compare the cutting edge 42b of the second bite is positioned at the above-mentioned axis direction front of hole making drill body 18, when relying on this circular openings device to start to cut, the first bite 38a is only utilized to cut, to bite workpiece better when starting to cut.
As shown in Figure 5, with the face H of the axes normal with hole making drill body 18 for benchmark, the angle of inclination x of the second bite Outboard Sections extended outside radial direction from the summit 42b ' of the cutting edge 42b of the second bite is made to be less than the angle of inclination y of the first bite Outboard Sections 50a extended laterally from the summit 42a ' of the cutting edge 42a of the first bite, make the outboard end 58a of the cutting edge 42a of the first bite than the outboard end 58b of the cutting edge 42b of the second bite further from the front end face 12 of hole making drill body 18, but be all and this front end face 12 separates the position at roughly the same interval.In the illustrated embodiment, lateral surface 62a, 62b of extending respectively from outer ledge and the inside edge of flank 44a, 44b of first and second bite 38a, 38b and the axis of medial surface 64a, 64b and hole making drill body almost parallel.
When using the circular openings device of said structure to carry out perforate operation, the first bite 38a cuts centered by the summit 42a ' of its cutting edge 42a, and its chip is transmitted directly in chip area 22.In addition, second bite 38b is to compare the summit 42a ' of the cutting edge 42a of the first bite 38a more by cutting centered by the summit 42b ' inside radial direction, and send chip towards chip area, but as mentioned above, in circular openings device of the present invention, owing to arranging the large outer lateral incline 54c of gradient on the cut sides 52b delimiting the otch 36b be positioned at before this second bite 38b, define the passage 56 for making the chip be sent pass through, thus chip can not enter in chip area in incision face with blocking.Therefore, the chip utilizing this circular openings device to cut can move smoothly through chip area and be discharged.
In addition, in this circular openings device, outboard end due to the cutting edge making the second bite becomes the position of the outboard end of the cutting edge close to this first bite, therefore, even if the outboard end of the cutting edge of the first bite has defect, the outboard end of the cutting edge of the second bite also can replace the outboard end of the cutting edge of the first bite to cut, and thus can extend the service life of this circular openings device.
The circular openings device with above-mentioned feature on probation has carried out perforate test, compared with current circular openings device, can improve its machinability (perforate namely in the short time) and durability significantly.
Just an embodiment of circular openings device of the present invention is illustrated above, but the present invention is not limited.Such as, although namely the cutting making the radial direction inboard portion in this circular openings device carry out tilts to the front of this circular openings device from the radial direction medial extremity of the second bite gradually towards the part outside radial direction, chip is necessary condition by releasing outside radial direction, but the shape of the cutting edge of the first and second bites might not be chevron, the cutting edge that can be formed as a bite has the shape at two or more top or the various shape such as trapezoidal, and this is apparent for those skilled in the art.
Claims (6)
1. a circular openings device, has:
The rear end linked with rotating driving device, the front end of the side contrary with this rear end, has the front end face of annular and the columnar hole making drill body of the inner peripheral surface rearward extended from this front end face and outer peripheral face;
Multiple chip area, described multiple chip area is in the form of slot, this outer peripheral face of this hole making drill body is spaced apart and arranged at circumferentially spaced, extend in the shape of a spiral from this front end face of this hole making drill body towards rear respectively, respectively with the direction of rotation of this circular openings device for benchmark, delimited by front wall, rear wall and interior sidewall surface;
Spiral helicine land portion, described land portion is formed between adjacent this chip area of this circumference;
Otch, described otch, in through be arranged on this hole making drill body front end with delimiting this interior sidewall surface of each chip area of the radial direction of this hole making drill body, delimited by the cut sides to be formed from this front end face to each chip area sunken inside; With
Multiple bite, described multiple bite is embedded in this land in the front end of this hole making drill body, and described multiple bite has rake and flank respectively; The chip area that described rake is adjacent towards the front side being benchmark and this land with this direction of rotation, this rear wall along this adjacent chip area extends, and has the cutting edge that this front end face comparing this hole making drill body is positioned at the anterior position of hole making drill body; Described flank from this cutting edge genesis with this direction of rotation for benchmark rearward extends, towards the front of this hole making drill body,
Described multiple bite is made up of the first and second bites, the first bite be arranged alternately by the circumference of this front end face at this hole making drill body and the second bite are formed, this cutting edge of this second bite is made up of radial direction inboard portion and radial direction Outboard Sections, the radial direction inboard portion that the correspondence of this cutting edge of this first bite is compared in described radial direction inboard portion with this hole making drill body for benchmark is positioned at anterior position, the radial direction Outboard Sections that described radial direction Outboard Sections compares the correspondence of this cutting edge of this first bite with this hole making drill body for benchmark is positioned at rear position, the part extended outside radial direction from radial direction medial extremity of the cutting edge of this second bite tilts to the front of this hole making drill body gradually along with outside radial direction,
The cut sides of this otch adjoined with the front side of this direction of rotation of this first bite is formed as inclined plane, described inclined plane more outside radial direction more to the back sweep of this hole making drill body, and continuous with the interior sidewall surface of the chip area being provided with this otch,
The feature of described circular openings device is,
The cut sides of this otch adjoined with the front side of this direction of rotation of this second bite is made up of lateral incline in otch and the outer lateral incline of otch; In described otch lateral incline along with the radial direction inside edge from this cut sides outside radial direction to the back sweep of this hole making drill body; The outer lateral incline of described otch is continuous with lateral incline in this otch, and more outside radial direction, the rear of getting over to this hole making drill body tilts more significantly than lateral incline in this otch, and continuous with the interior sidewall surface of the chip area being provided with this otch; The outer lateral incline of this otch delimited out along being cut by this radial direction inboard portion of this cutting edge from this second bite and the passage of the transport direction of the chip sent towards this chip area.
2. circular openings device according to claim 1, it is characterized in that, with this inclined plane of the cut sides of this otch that the front side of this direction of rotation of this first bite adjoins with lateral incline in the otch of the cut sides of this otch that the front side of this direction of rotation of this second bite adjoins, there is identical angle of inclination.
3. circular openings device according to claim 1 and 2, it is characterized in that, this radial direction inboard portion of this cutting edge of this second bite is formed as chevron, and this chevron is made up of the summit outside sloping portion inside sloping portion outside sloping portion, cutting edge inside cutting edge and this cutting edge and cutting edge between sloping portion; Inside this cutting edge, sloping portion tilts to the front of this hole making drill body gradually along with the radial direction medial extremity of the cutting edge from this second bite outside radial direction; Outside this cutting edge, inside sloping portion and this cutting edge, sloping portion is continuous, more outside radial direction more to the back sweep of this hole making drill body.
4. circular openings device according to claim 3, it is characterized in that, this radial direction Outboard Sections of this cutting edge of this first bite is formed as chevron, and this chevron is made up of the summit outside sloping portion inside sloping portion inside sloping portion, cutting edge outside bite and this cutting edge and cutting edge between sloping portion; Outside this bite, sloping portion tilts to the front of this hole making drill body gradually along with the radial direction outboard end of the cutting edge from this first bite inside radial direction; Inside this cutting edge, outside sloping portion and this bite, sloping portion is continuous, more outside radial direction more to the back sweep of this hole making drill body.
5. circular openings device according to claim 4, it is characterized in that, this radial direction Outboard Sections of the cutting edge of this second bite and the radial direction inboard portion of this second bite tilt continuously, the angle of inclination tilted outside radial direction along with this summit of this cutting edge from this second bite be less than this first bite bite outside the angle of inclination of sloping portion, the outboard end of the cutting edge of this second bite becomes the position close with the outboard end of the bite of this first bite.
6. circular openings device according to claim 1, it is characterized in that, the cut sides of this otch is while the front to this direction of rotation from the substantial middle position of the fore-and-aft direction of this hole making drill body on the rake of adjacent bite extends, and the front towards this hole making drill body extends to the front end face of this annular.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2010/060387 WO2011158378A1 (en) | 2010-06-18 | 2010-06-18 | Ring-shaped hole cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102947033A CN102947033A (en) | 2013-02-27 |
| CN102947033B true CN102947033B (en) | 2014-12-24 |
Family
ID=45347798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080067493.0A Active CN102947033B (en) | 2010-06-18 | 2010-06-18 | Ring-shaped hole cutter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5059972B2 (en) |
| CN (1) | CN102947033B (en) |
| WO (1) | WO2011158378A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364138A (en) * | 2015-12-09 | 2016-03-02 | 重庆光大机械厂有限公司 | Hollow annular groove drilling bit |
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| CN1091077A (en) * | 1992-12-16 | 1994-08-24 | 希尔蒂股份公司 | Hollow boring bit with face cutting edge |
| GB2278793A (en) * | 1994-05-10 | 1994-12-14 | Bradford Tool And Gauge Ltd | Hole cutting tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3609056A (en) * | 1969-06-05 | 1971-09-28 | Everett D Hougen | Hole cutter |
| GR77678B (en) * | 1981-09-21 | 1984-09-25 | Hougen Everett D | |
| JPS59142013A (en) * | 1983-01-26 | 1984-08-15 | Oomi Kogyo Kk | Hole cutter |
| JPS6025609A (en) * | 1983-07-20 | 1985-02-08 | Nippon Konechikatsutosoo Kk | Annular drilling blade |
| US4474743A (en) * | 1983-07-21 | 1984-10-02 | Ethyl Corporation | Preparation of silane from amine alanes |
| JPS6071514U (en) * | 1983-10-24 | 1985-05-20 | 大見工業株式会社 | hole cutter |
| JPH07100248B2 (en) * | 1990-08-22 | 1995-11-01 | 日東工器株式会社 | Circular cutting tool |
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2010
- 2010-06-18 WO PCT/JP2010/060387 patent/WO2011158378A1/en active Application Filing
- 2010-06-18 JP JP2011514961A patent/JP5059972B2/en active Active
- 2010-06-18 CN CN201080067493.0A patent/CN102947033B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2182588A (en) * | 1985-11-11 | 1987-05-20 | Dennis Hubbard | Annular hole cutter |
| CN1036720A (en) * | 1988-03-18 | 1989-11-01 | 埃维里特·D·霍根 | The annular milling cutter and the manufacture method that have radial clearance |
| CN1091077A (en) * | 1992-12-16 | 1994-08-24 | 希尔蒂股份公司 | Hollow boring bit with face cutting edge |
| GB2278793A (en) * | 1994-05-10 | 1994-12-14 | Bradford Tool And Gauge Ltd | Hole cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2011158378A1 (en) | 2013-08-15 |
| WO2011158378A1 (en) | 2011-12-22 |
| CN102947033A (en) | 2013-02-27 |
| JP5059972B2 (en) | 2012-10-31 |
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